1. The problem statement, all variables and given/known data View attachment 207518 View attachment 207517 View attachment 207519 2. Relevant equations 3. The attempt at a solution Let me assume that initially the spring is at its natural length. The normal force acting in the vertical direction will manage the gravitational force. And the normal force acting in the radially inward direction will provide the centripetal acceleration. There is no force acting along the line AB. So, why will the sleeve move along AB at the first place?